1#ifndef __ASM_SH_PGALLOC_H
 2#define __ASM_SH_PGALLOC_H
 3
 4#include <linux/quicklist.h>
 5#include <asm/page.h>
 6
 7#define QUICK_PT 0	/* Other page table pages that are zero on free */
 8
 9extern pgd_t *pgd_alloc(struct mm_struct *);
10extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
11
12#if PAGETABLE_LEVELS > 2
13extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
14extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
15extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
16#endif
17
18static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
19				       pte_t *pte)
20{
21	set_pmd(pmd, __pmd((unsigned long)pte));
22}
23
24static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
25				pgtable_t pte)
26{
27	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
28}
29#define pmd_pgtable(pmd) pmd_page(pmd)
30
31/*
32 * Allocate and free page tables.
33 */
34static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
35					  unsigned long address)
36{
37	return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
38}
39
40static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
41					unsigned long address)
42{
43	struct page *page;
44	void *pg;
45
46	pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
47	if (!pg)
48		return NULL;
49	page = virt_to_page(pg);
50	if (!pgtable_page_ctor(page)) {
51		quicklist_free(QUICK_PT, NULL, pg);
52		return NULL;
53	}
54	return page;
55}
56
57static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
58{
59	quicklist_free(QUICK_PT, NULL, pte);
60}
61
62static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
63{
64	pgtable_page_dtor(pte);
65	quicklist_free_page(QUICK_PT, NULL, pte);
66}
67
68#define __pte_free_tlb(tlb,pte,addr)			\
69do {							\
70	pgtable_page_dtor(pte);				\
71	tlb_remove_page((tlb), (pte));			\
72} while (0)
73
74static inline void check_pgt_cache(void)
75{
76	quicklist_trim(QUICK_PT, NULL, 25, 16);
77}
 
 
 
 
78
79#endif /* __ASM_SH_PGALLOC_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_PGALLOC_H
 3#define __ASM_SH_PGALLOC_H
 4
 
 5#include <asm/page.h>
 6#include <asm-generic/pgalloc.h>
 
 7
 8extern pgd_t *pgd_alloc(struct mm_struct *);
 9extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
10
11#if PAGETABLE_LEVELS > 2
12extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
13extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
14extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
15#endif
16
17static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
18				       pte_t *pte)
19{
20	set_pmd(pmd, __pmd((unsigned long)pte));
21}
22
23static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
24				pgtable_t pte)
25{
26	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
27}
28#define pmd_pgtable(pmd) pmd_page(pmd)
29
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
30#define __pte_free_tlb(tlb,pte,addr)			\
31do {							\
32	pgtable_pte_page_dtor(pte);			\
33	tlb_remove_page((tlb), (pte));			\
34} while (0)
35
36#if CONFIG_PGTABLE_LEVELS > 2
37#define __pmd_free_tlb(tlb, pmdp, addr)			\
38do {							\
39	struct page *page = virt_to_page(pmdp);		\
40	pgtable_pmd_page_dtor(page);			\
41	tlb_remove_page((tlb), page);			\
42} while (0);
43#endif
44
45#endif /* __ASM_SH_PGALLOC_H */